Q.The focal length of a biconvex lens is 10 cm.Find the radius of carvature.When we apply the formula R=2f,we get 20 cm,but if we apply the lens maker formula we get 10 cm(taking R.I.=1.5) .Please explain these contradictory results.Please help!!!


 Sunindra Kanghujam

2 years ago


Post Your Answer

More Questions On Wave Optics

Ask Experts

Have any Question? Ask Experts
Post Question
Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
The focal lengths of the objective and eyepiece of a telescope are 60cm and 5 cm respectively. Find its magnifying power i) for normal adjustment and ii) when the image is formed at near...
1) by using magnifying power of normal adjastment =f0/-fe =-60/5 = -12 2)for near point m=fo/fe(1+fe/D) = -14.4
G.Rajashekar 11 months ago
By using the formula -25S''/f.f
Gangadher 11 months ago
What Is Primary And Secondry Rainbow.
The primary rainbow forms between about 40° and 42° from the antisolar point. The light path involves refraction and a single reflection inside the water droplet. If the drops are large, 1...
Mukesh Sharma 6 months ago
what is the formula for velocity in x and y direction of a point object which is not at the principal axis but a bit above from it
V image wrt mirror in y direction = f/(f-u) V object wrt mirror in y direction + h.f/(f-u)^2 V object wrt mirror in x direction velocity of image in x direction = -m^2(velocity of object in...
rishabh 11 months ago
A moving charge produces a magnetic field...this happens why and how
A charged particle moving without acceleration produces an electric as well as a magnetic field . Electric and magnetic fields are what the electromagnetic field 'looks like' from a...
Rinkoo Gupta 3 months ago
We know that in special relativity, going from one reference frame to another changes the fields from one type to another. In other words, if you have an electric field but no magnetic field...
Vasantha Kumari 3 months ago
what is mean by electric dipole?
Hello, An electric dipole is two charged objects, with equal but opposite electric charges, that are separated by a distance. Thanks & Regards Sumit Majumdar, askIITians Faculty Ph.D,...
Sumit Majumdar 10 months ago
Two equal and opposite small charges which are seperated by a small distance is called an electric dipole.
Arbaz IIIT 10 months ago
a dipole with equal and opposite electric charges
KOPPULA ANIL 10 months ago
what is interference?
Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from...
Arun Kumar 3 months ago
Two waves (of the same wavelength) are said to be in phase if the crests (and troughs) of one wave coincide with the crests (and troughs) of the other.
Indu 3 months ago
View all Questions »